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Effect of Variety and Time of Cleft Grafting on the Success Survivability and Growth in Aonla (phyllanthus Emblica L.)

M. A. Mukta
M. S. Fellow
Department of Horticulture, Bangladesh Agricultural University, Mymensingh, Bangladesh

S. H. Choudhury
Professor
Department of Horticulture, Bangladesh Agricultural University, Mymensingh, Bangladesh

M. A. Rahim
Professor
Department of Horticulture, Bangladesh Agricultural University, Mymensingh, Bangladesh

Abstract/ Executive Summary:

The present experiment was conducted at the Germplasm Centre (GPC) of Fruit Tree Improvement Program (FTIP), BAU, Mymensingh during the period from April, 2012 to November, 2012 to investigate the effect of variety and time of cleft grafting on the success, survivability and growth of grafts in aonla. The experiment consisted of two factors such as (i) three varieties viz., BAU amlaki-1, BAU amlaki-2 and Local variety-Dhaka and (ii) ten different times of grafting viz., each 10 and 25 of April, May, June, July and August, 2012. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The grafts were kept under observation in poly tunnel condition. Most of the parameters showed significant variations due to the effect of the two factors. In respect of variety, the minimum time required for bud breaking (11.43 days) and leaf opening (15.71 days) with the highest graft height (57.47 cm), number of leaves (81.77) and branches (3.75), graft success (83.65%) and survivability (81.71%) were observed in BAU amlaki-1. In respect of time of grafting, the lowest time required for bud breaking (10.50 days) and leaf opening (14.41 days) with the highest graft height (58.86 cm), number of leaves (109.83) and branches (4.05), graft success (90.71%) and survivability (88.10%) were found when grafting was done on 25 May, 2012. Considering the combined effect, BAU amlaki-1 grafted on 25 May, 2012 required the lowest time for bud breaking (9.50 days) and leaf opening (13.62 days) with the highest graft height (61.98 cm), number of leaves (117.50) and branches (4.20), graft success (93.15%) and survivability (90.73%). Thus, the results of the present investigation advocated that 25 May grafting with BAU amlaki-1 performed the best.

Keywords: Aonla, Variety, Time of grafting, Success, Survivability, Growth

Location: Department of Horticulture, Bangladesh Agricultural University, Mymensingh, Mymensingh

Start Date: 01-04-2012

End Date: 30-11-2012

Program Area: Variety and Species

Commodity: Aonla

Objectives:

To find out the best variety and appropriate time of grafting operation for getting higher success, survivability and growth of aonla grafts.

Methodology:

The experiment was conducted at the ‘BAU Germplasm Centre’ (GPC) of Fruit Tree Improvement Program (FTIP), Department of Horticulture, Bangladesh Agricultural University, Mymensingh during the period from April, 2012 to November, 2012. The experiment consisted of two factors such as (i) three varieties viz., BAU amlaki-1, BAU amlaki-2 and Local variety-Dhaka. and (ii) ten times of grafting viz., each 10 and 25 of April, May, June, July and August of 2012. The two-factor experiment was laid out in the Randomized Complete Block Design (RCBD) with three replications. Nearly 3 to 4 months old seedling rootstocks of unknown cultivars of anole raised in the polybags in the nursery of Muktagacha were collected. Among these, only the healthy, vigorous, straight, strong, pest and disease free seedlings having uniform in size and growth were selected for the experiment. Scions having diameter nearly similar to rootstocks were collected from selected mother plants of aonla (i.e., BAU amlaki-1, BAU amlaki-2 and Local variety-Dhaka) that were of about 4-5 years old with uniform bearing. The grafting operations were performed at ten different times on preplanned date satisfying the requirements of the experiment. Intercultural operations like weeding, mulching, watering and after care management practices like removal of water, carbon dioxide and heat from the poly cap, removal of off- shoots, polythene cap and polythene strip and control of disease and insect pest were done timely during the period of investigation. The grafts in poly bags were kept under observation in poly tunnel. Data were recorded from the grafted plants based on the days required for bud breaking and leaf opening, lengths of rootstock and scion, graft height, number of leaves and branches per graft and percentage of graft success and survivability. The shoot with opened leaves from the lateral bud of scion was considered as the success of a graft. The number of successful grafts in each treatment was counted at 10 days interval upto 90 DAG. Increased graft height, rootstock and scion lengths, number of leaves and branches were measured at 30 days interval starting from 30 DAG and were continued upto 90 DAG. After 90 DAG, the percentage of graft survival was calculated. All the recorded data were statistically analyzed for interpretation of results.

Source of Information: Bangladesh J. Seed Sci. & Tech. 16 (1 &2): 199-208 (2012), ISSN 1029 - 8800

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In respect of time of grafting, the lowest time required for bud breaking (10.50 days) and leaf opening (14.41 days) with the highest graft height (58.86 cm), number of leaves (109.83) and branches (4.05), graft success (90.71%) and survivability (88.10%) were found when grafting was done on 25 May, 2012. Considering the combined effect, BAU amlaki-1 grafted on 25 May, 2012 required the lowest time for bud breaking (9.50 days) and leaf opening (13.62 days) with the highest graft height (61.98 cm), number of leaves (117.50) and branches (4.20), graft success (93.15%) and survivability (90.73%). Thus, the results of the present investigation advocated that 25 May grafting with BAU amlaki-1 performed the best. From the present study it can be concluded that for the highest percentage of success and survivability and the maximum growth of grafts in aonla grafting should be done in the month of May under polytunnel condition with the scion of BAU amlaki-1.

Knowledge Management: Journal